Read the passage from Life on the Mississippi, an account of Mark Twain’s experiences as a riverboat captain. I soon discovered two things. One was that a vessel would not be likely to sail for the mouth of the Amazon under ten or twelve years; and the other was that the nine or ten dollars still left in my pocket would not suffice for so imposing an exploration as I had planned, even if I could afford to wait for a ship. Therefore it followed that I must contrive a new career. The "Paul Jones” was now bound for St. Louis. I planned a siege against my pilot, and at the end of three hard days he surrendered. He agreed to teach me the Mississippi River from New Orleans to St. Louis for five hundred dollars, payable out of the first wages I should receive after graduating. I entered upon the small enterprise of "learning” twelve or thirteen hundred miles of the great Mississippi River with the easy confidence of my time of life. If I had really known what I was about to require of my faculties, I should not have had the courage to begin. I supposed that all a pilot had to do was to keep his boat in the river, and I did not consider that that could be much of a trick, since it was so wide.

Which statement best summarizes the passage?

Twain feels confident about learning the Mississippi River.
Twain finds that piloting a riverboat is not as easy as it looks.
Twain convinces his pilot to teach him how to navigate a riverboat.
Twain is concerned about not having enough money to survive.